Leptogenesis with small violation of B - L

被引：26

作者：

Racker, J. ^{[1
,2
,3
,4
]}

Pena, Manuel ^{[1
,2
]}

Rius, Nuria ^{[1
,2
]}

机构：

[1] Univ Valencia, CSIC, Dept Fis Teor, Valencia 46071, Spain

[2] Univ Valencia, CSIC, IFIC, Valencia 46071, Spain

[3] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[4] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Spain

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 07期

关键词：

leptogenesis; neutrino theory; BARYON-NUMBER NONCONSERVATION; LEPTON-FLAVOR; NEUTRINO MASS; RESONANT LEPTOGENESIS; BARYOGENESIS; ASYMMETRIES; DECAYS;

D O I：

10.1088/1475-7516/2012/07/030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze leptogenesis in the context of seesaw models with almost conserved lepton number, focusing on the L-conserving contribution to the flavoured CP asymmetries. We find that, contrary to previous claims, successful leptogenesis is feasible for masses of the lightest heavy neutrino as low as M-1 similar to 10(6) GeV, without resorting to the resonant enhancement of the CP asymmetry for strongly degenerate heavy neutrinos. This lower limit renders thermal leptogenesis compatible with the gravitino bound in supersymmetric scenarios.

引用

页数：18

共 57 条

[1] Flavour issues in leptogenesis [J].

Abada, A ;

Davidson, S ;

Josse-Michaux, FX ;

Losada, M ;

Riotto, A .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2006, (04)

[2] Flavour matters in leptogenesis [J].

Abada, Asmaa ;

Davidson, Sacha ;

Ibarra, Alejandro ;

Josse-Michaux, Francois-Xavier ;

Losada, Marta ;

Riotto, Antonio .

JOURNAL OF HIGH ENERGY PHYSICS, 2006, (09)

[3] The C P-asymmetry in resonant leptogenesis [J].

Anisimov, A ;

Broncano, A ;

Plümacher, M .

NUCLEAR PHYSICS B, 2006, 737 (1-2) :176-189

[4]

[Anonymous], 1980, NATO Sci. Ser. B

[5]

[Anonymous], SUP WORKSH STON BROO

[6]

[Anonymous], ARXIV11126428

[7] Non-unitary leptonic mixing and leptogenesis [J].

Antusch, Stefan ;

Blanchet, Steve ;

Blennow, Mattias ;

Fernandez-Martinez, Enrique .

JOURNAL OF HIGH ENERGY PHYSICS, 2010, (01)

[8] Leptogenesis with an almost conserved lepton number [J].

Asaka, Takehiko ;

Blanchet, Steve .

PHYSICAL REVIEW D, 2008, 78 (12)

[9] Baryogenesis through leptogenesis [J].

Barbieri, R ;

Creminelli, P ;

Strumia, A ;

Tetradis, N .

NUCLEAR PHYSICS B, 2000, 575 (1-2) :61-77

[10] LEPTON FLAVOR NONCONSERVATION AT HIGH-ENERGIES IN A SUPERSTRING INSPIRED STANDARD MODEL [J].

BERNABEU, J ;

SANTAMARIA, A ;

VIDAL, J ;

MENDEZ, A ;

VALLE, JWF .

PHYSICS LETTERS B, 1987, 187 (3-4) :303-308

← 1 2 3 4 5 6 →